interface

问题 Reading a Previous SO Question I was confused to find Eric Lippert saying that an interface cannot be defined in C# for all Monads, using an implementation as below: typeInterface Monad<MonadType<A>> { static MonadType<A> Return(A a); static MonadType<B> Bind<B>(MonadType<A> x, Func<A, MonadType<B>> f); } My problem is all the problems listed in the question seem to have easy solutions: no "higher kinded types" => use parent interfaces no static method in interface. => why use static?! just

问题 Reading a Previous SO Question I was confused to find Eric Lippert saying that an interface cannot be defined in C# for all Monads, using an implementation as below: typeInterface Monad<MonadType<A>> { static MonadType<A> Return(A a); static MonadType<B> Bind<B>(MonadType<A> x, Func<A, MonadType<B>> f); } My problem is all the problems listed in the question seem to have easy solutions: no "higher kinded types" => use parent interfaces no static method in interface. => why use static?! just

问题 Reading a Previous SO Question I was confused to find Eric Lippert saying that an interface cannot be defined in C# for all Monads, using an implementation as below: typeInterface Monad<MonadType<A>> { static MonadType<A> Return(A a); static MonadType<B> Bind<B>(MonadType<A> x, Func<A, MonadType<B>> f); } My problem is all the problems listed in the question seem to have easy solutions: no "higher kinded types" => use parent interfaces no static method in interface. => why use static?! just

问题 I want to achieve something like this in C# 3.5: public void Register<T>() : where T : interface {} I can do it with class or struct, but how to do it with an interface? 回答1: C# and the CLR don't support overall interface constraints, although you can constrain it to a particular interface (see other answers). The closest you can get is 'class' and check the type using reflection at runtime I'm afraid. Why would you want an interface constraint in the first place? 回答2: If you are asking about

问题 As I understand it, --strictFunctionTypes compiler option in Typescript prevents a very common use case of polymorphism from working: type Handler = (request: Request) => Response const myHandler: Handler = (request: Request & { extraArg: boolean }) => { return !!request.extraArg } Generally, I assume that all compiler options in the strict family have some great benefits, but in this case, all I see is that it prevents a very logical behavior from working. So what are the cases where this

问题 As I understand it, --strictFunctionTypes compiler option in Typescript prevents a very common use case of polymorphism from working: type Handler = (request: Request) => Response const myHandler: Handler = (request: Request & { extraArg: boolean }) => { return !!request.extraArg } Generally, I assume that all compiler options in the strict family have some great benefits, but in this case, all I see is that it prevents a very logical behavior from working. So what are the cases where this

问题 As I understand it, --strictFunctionTypes compiler option in Typescript prevents a very common use case of polymorphism from working: type Handler = (request: Request) => Response const myHandler: Handler = (request: Request & { extraArg: boolean }) => { return !!request.extraArg } Generally, I assume that all compiler options in the strict family have some great benefits, but in this case, all I see is that it prevents a very logical behavior from working. So what are the cases where this

问题 An interviewer asked me the following question in interview, but I don't know what could be the answer of this question, please help!!! What must be done if i don't want to implement a function in my class that is declared in an interface which is implemented by my class. Edited: I am using .NET with C#. It will be great if anyone can provide a sample code example in C#. Thanks 回答1: Implement the function, but throw an exception in the implementation. In .NET, you typically use one of the

问题 An interviewer asked me the following question in interview, but I don't know what could be the answer of this question, please help!!! What must be done if i don't want to implement a function in my class that is declared in an interface which is implemented by my class. Edited: I am using .NET with C#. It will be great if anyone can provide a sample code example in C#. Thanks 回答1: Implement the function, but throw an exception in the implementation. In .NET, you typically use one of the

问题 An interviewer asked me the following question in interview, but I don't know what could be the answer of this question, please help!!! What must be done if i don't want to implement a function in my class that is declared in an interface which is implemented by my class. Edited: I am using .NET with C#. It will be great if anyone can provide a sample code example in C#. Thanks 回答1: Implement the function, but throw an exception in the implementation. In .NET, you typically use one of the